Font shape `TU/LatinModernMath(1)/b/n' undefined(Font) using `TU/LatinModernMath(1)/m/n' instead

Question

In the following, the row command row{1} = {font=\boldmath\bfseries} gets me this error

Font shape TU/LatinModernMath(1)/b/n' undefined(Font) using TU/LatinModernMath(1)/m/n' instead

so, how can I fix it?

\documentclass{article}
\tracinglostchars=3 
\usepackage[english, bidi = basic, layout = lists]{babel}
\usepackage{fontspec}
\defaultfontfeatures{ Scale=MatchLowercase, Ligatures=TeX }
\babelprovide[import, onchar = ids fonts, mapdigits]{arabic}
\babelfont{rm}[Ligatures={Common,Rare}, Scale=1.0, Language=Default]{Latin Modern Roman}
\babelfont[arabic]{rm}[Language=Default]{ScheherazadeNew}
\babelfont{sf}[Ligatures={Common,Rare}, Language=Default]{Latin Modern Sans}
\babelfont[arabic]{sf}[Language=Default]{ScheherazadeNew}
\usepackage{mathtools}
\usepackage[bold-style=TeX]{unicode-math}
\setmathfont[math-style=ISO]{Latin Modern Math}
\usepackage{tabularray}
\begin{document}
    \begin{tblr}{ colspec = { X },  row{1} = {font=\boldmath\bfseries} }
        $\symbf{\delta_i}$
    \end{tblr}
\end{document}

Answer 1

You can use a fake bold version:

\documentclass{article}  
\usepackage{unicode-math} 
\setmathfont{Latin Modern Math}[math-style=ISO,version=normal]  
\setmathfont{Latin Modern Math}[version=bold,math-style=ISO,FakeBold = 3]
\begin{document} 
$x$ \boldmath $x$
\end{document}